Questions › Category: Questions › Covid 19 0 Vote Up Vote Down Adrienne P asked 2 years ago Hi, I found you listed on the EPA N list. What PPM dilution is required for killing Covid 19 on surfaces? Thank you! 1 Answers 0 Vote Up Vote Down PX10 Staff answered 2 years ago The PX10 PPM dilution required for killing Covid-19 on surfaces is 500 PPM, which is 20 Grams per gallon.